Machine for setting band-saws.



No. 803,432. Q PATENTED OCT. 31, 1905; J. G. REGKWEG.

MACHINE FOR SETTING BAND SAWS.

APPLICATION FILED AUG. 30,1904.

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MACHINE FOR SETTING BAND SAWS.

APPLIGATIQN FILED we. 30,1904.

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No- 803,432. PATENTED OUT. 31, 1905. J. G. REGKWBG.

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UNITED STATES PATENT OFFICE.

JOHN C. REOKWEG, OF LOS ANGELES, CALIFORNIA.

MACHINE FOR SETTING BAND-SAWS.

To all whom it may concern.-

Be it known that I, JOHN G. REcKwne, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Machines for Setting Band-Saws; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.-

My invention relates to improvements in machines for setting band-saws; and it consists in the peculiar construction, combination, and arrangement of devices hereinafter fully described and claimed.

The object of my invention is to provide a simple, durable, and efficient machine of this character by means of which the teeth of a band-saw may be rapidly and perfectly set so that the saw will be true and uniform.

The above and other objects, which will appear as the nature of my invention is better understood, 1 accomplish by the construction illustrated in the accompanying drawings, in which Figure 1 is a front elevation of my im- Fig. 2 is a rear elevation of the same. Fig. 3 is a top plan view showing the saw-setting jaws in their closed position. Fig. 4 is a similar view of the machine, showing its saw-setting jaws in their open position. Fig. 5 is an elevation of one end of the machine. Fig. 6 is an elevation of the other end of the machine. Fig. 7 is a vertical transverse sectional view taken on the line 7 7 of Fig. 4. Fig. 8 is a detail sectional View taken on the line 8 8 of Fig. 1. Fig. 9 is a detail view of the cam for operating the saw-feeder. Fig. 10 is a perspective view of the cam for operating the saw-setting device, and Fig. 11 is a detail inner face view of one of the saw-setting jaws.

Referring to the drawings by numerals, 1 denotes the body portion of the machine, which consists of a suitable base 2 and a vertically-disposed frame or support 3, having on one end a saw-setting mechanism 4 and upon its other end a saw-filing mechanism 5.

The saw-setting mechanism comprises a stationary jaw 6 and a movable jaw 7, the jaw 6 being mounted upon the upper portion of the frame 3, at one end thereof, and the jaw 7 being mounted upon a movable arm 8. Said jaws may be made integrally with the frame 3 and the arm 8, and they may be of any suitable Specification of Letters Patent.

Application filed August 30, 1904.

Patented Oct. 31, 1905.

Serial No. 222,715.

construction; butI preferably make them detachable and longitudinally adjustable by securing them in recesses 9, formed in said frame and arm. As shown, each of said jaws consists of a small block or bar of steel, which has its bottom beveled, as shown at 1O, to rest upon the beveled bottom of one of said recesses 9. The inner or opposite faces of the jaws are formed with a series of depressions 11 and projecting portions 12, which when the jaws are clamped upon a saw-band set the teeth of the latter, as will be readily understood. Any suitable number of these depressions and projections may be provided, and, as will be understood, they are arranged or disposed according to the teeth upon the saw which is to be set.

In order to adapt the machine to different kinds of saws, corresponding sets of jaws must be provided, and they are removably secured in recesses 9 by set-screws 13, which are passed through longitudinally-disposed slots 14, formed in said jaws, and engage screw-threaded openings formed in the frame 3 and arm 9. By passing the screws through said longitudinally-disposed slots it will be seen that said jaws may be adjusted longitudinally.

The movable arm 8 is mounted to swing so that the jaw 7 will be moved toward and from the jaw 6. The mounting of this arm may be effected in any desired manner; but I preferably pivot its lower end 15 in a recess 16, formed in an enlarged portion 17 of the frame 3 by passing a bolt 18 through alining openings formed in said enlargement at said end. The arm 8 may be operated in any suitable manner. As shown, I have provided a flat spring 19, which has its end secured to the frame 3 and its opposite end bearing against the inner face of the arm 8 in order to force the arm 8 outwardly to move the jaw 7 away from the jaw 6.

In order to force the jaw 7 upon the jaw 6 in the setting operation, I provide a laterallyprojecting portion 20 upon the upper end of the arm and depending tooth or projection 21, which is curved, as shown, to engage the cam-groove 22, formed on the periphery of the wheel 23, which is mounted upon .a horizontally-disposed shaft 24. Said shaft 24 projects through a slot 25, formed in the arm 8, and is mounted in a suitable bearing provided in the frame 2. Said cam-groove 22, which is shown in Fig. 10 of the drawings, is formed with an abrupt lateral offset 26 and IIO is of such construction that when said wheel is rotated the jaw 7 will remain open during two-thirds of the revolution of the shaft 24 and during the remainder of its revolution will be forced firmly against the saw, which is interposed between said jaws. As soon as the offset portion 26 of said cam passes the tooth or projection 21 upon the arm 8 a spring 19 will force the latter outwardly, and the jaw 7 will instantly release the saw.

In order to guide the band-saw A, the teeth of which are to be set, between the two jaws 6 and 7, I provide a suitable guide 27 in the form of a longitudinallydisposed bar 28, formed upon its upper side with a channel or groove 29, in which the saw A is adapted to slide. Said channel-bar 28 is disposed parallel to the frame 3, upon which it is adjustably mounted, and has one of its ends projecting between said frame and the arm 8 beneath the jaws 6 and 7. Said channel-bar may be adjusted in any suitable manner; but I preferably provide upon its under side two depending arms 30, the sides of which are beveled, as at 31, to engage bevel-guides 32, provided upon the front side of the frame 3. By this construction the guide is permitted to slide vertically to receive saws of different widths, and in order to secure the same in an adjusted position said arms 30 are formed with vertically disposed slots 33, through which set-screws 34 are passed to clamp said arms upon the frame 3.

In order to feed the saw A between the jaws 6 and 7 when they are in their open position, I provide a suitable feeding mechanism 35, which moves the saw intermittently. As shown, said feeding mechanism comprises a reciprocatory bar 36, which is mounted to slide in a laterally-projecting enlargement 37, provided upon the rear side of the frame 3. Said portion 37 is formed with a longitudinally-disposed inverted-T-shaped groove 38, in which a similarly-shaped tongue 39 upon the under side of the bar 36 is adapted to slide. Upon the inner end of the bar 36 is pivotally mounted, so as to swing in a vertical plane, a saw-engaging arm or element 40, which consists of a body portion 41, a longitudinally-extending finger 42, and an upwardly-projecting portion or lug 43. In said lug 43 is mounted, as shown at 44, a horizontally-extending arm 45, having upon its outer end a plate 46, which is adjusted as shown at 47 and adapted to engage the teeth of the saw head. The pivotal connection of the swinging arm 40 with the bar 36' may be effected in any desired manner. As shown, the same is provided with a reduced end 48, which is pivoted, as at 49, in a recess 50, formed in one end of the bar 36.

In order to hold the plate 46 in engagement with the saw-teeth, I secure, as at 51, upon the upper side of the bar 36 a flat spring 52, which has one of its ends bearing upon the up- 1 per side of the arm 40 to force the latter downwardly. The bar 36 may be reciprocated in any desired manner; but I preferably connect it, by means of a connecting-rod 53, to a crank wheel or gear 54, which is journaled upon a stub-shaft 55, projecting from the rear side of the frame 3. The upper end of the connecting-rod 53 is pivoted, as at 56, adjacent to one end of the bar 36, and its other end is pivoted, as at 57 upon the crankpin 58, which is adjustably secured upon the crank wheel or gear 54. This adjustment is preferably effected by forming said gear with a radially-disposed series of openings 58, in

any one of which said crank-pin may be secured. As shown, said crank-wheel 54 has its periphery formed with gear-teeth 59, which mesh with a gear 60, secured upon the rear portion of the shaft 24, so that when said shaft 24 is rotated to operate the saw-setting mechanism 4 the saw-feeding mechanism 35 will also be operated.

In order to swing the arm 40 to move its saw-engaging plate 36 into and out of engagement with the saw-teeth when the bar 36 is reciprocated, the projecting finger or end 42 of the arm 40 bears upon a cam 61, secured upon the rear end of the shaft and provided with a guide-flange 62. Said cam 61, as shown in Fig. 9 of the drawings, comprises a reduced portion 63, which extends around a little less than one-half the periphery of the cam, and an enlarged portion 64, which forms the remainder of the periphery of said cam. The disposition of the cam 61 upon the shaft 24 is such that when the end or finger 42 is engaged with the reduced portion 62 of said cam the reciprocating bar is moved in the direction of the saw-setting jaws 6 and 7 and the saw-engaging plate 46 is in engagement with the teeth of the saw A, so that the latter will be fed between said jaws, which are then in their open position. When the forward end of the enlarged portion 63 of the cam 61 is moved into engagement with the under side of the end of finger 42, the arm 40 will be elevated to disengage its saw-toothengaging plate 46 from the saw-teeth, and during the succeeding portion of the revolution of said cam said plate will be held out of engagement with the saw, and at the same time the bar 36 will be reciprocated away from the saw-setting jaws to move the plate 46 rearwardly to a position to permit it to engage some of the succeeding saw-teeth as soon as the finger or end 42 passes off of the enlarged portion 63 and onto the reduced portion 62 of said cam.

The construction and disposition of the camwheel 23, which operates the saw-setting jaws, the crank-wheel 54, which operates the reciprocating bar 36, and the cam 61, which moves the saw-engaging portion of said reciprocating bar into and out of engagement with the saw, are such that when the saw-clamping jaws are in their open position the saw is moved forwardly between said jaws by the plate 46 engaging the teeth of the saw and that when the jaws are in their clamped position the saw-feeding plate 46 will be disengaged from the saw-teeth, moved rearwardly, and again engaged with some of the succeeding teeth of said saw.

In order to file the ends of the teeth of the saw so that they will all project into the same plane, I mount upon the upper side of the portion 37 of the frame 3, above one end of the saw-guide 27, a saw-file 64 The latter is here shown in the form of a bar or plate having a roughened or cutting surface 65 upon its under side and two upwardly-projecting arms 66, which are adjustably secured on a bracket 67, adjustably mounted upon said portion 37 of the frame 3. An adjustment of the arm 66 upon the bracket 67 is preferably effected by passing set-screws 68 through vertically-disposed slots 69, formed in said arms, so that the saw-file may be adjusted vertically toward and from the saw-guide 27. Said bracket 67 is adapted to be adjusted horizontally upon said portion 37 by passing setscrews 7 0 through slots 71, formed in a hori- Zontally-disposed portion 72 of said bracket 67, which portion rests upon the upper side of the portion 37 of the frame 3. By means of this adjustment it will be seen that a fresh portion of a guide-surface of the file may be brought over the saw-teeth from time to time.

From the foregoing description, taken in connection with the accompanying drawings, it is thought that the construction, operation, and advantages of my invention will be readily understood. The shaft 24 may be rotated by hand or any suitable means, and it will be seen that when the parts are properly adjusted the band-saw A as it is fed through the guide 47 will have its teeth both filed and set. By reason of the various adjustments previously described the machine is adapted to set or joint saws of various kinds and sizes, and this is done in a rapid and thorough manner.

While 1 have shown and described the preferred embodiment of my invention, 1 wish it understood that I do not limit myself to the precise construction stated, as various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is*

1 A machine of the class described comprising a frame or support having a stationary saw-setting jaw, a swinging arm having a movable saw-setting jaw, means for intermittently feeding the saw, a shaft, a wheel upon said shaft having a cam-groove provided with a lateral offset, a tooth or projection upon said swinging arm adapted to coact with said camgroove to close said jaw, and a'spring for opening said jaw, when the offset portion of said cam-groove passes said tooth or projection, substantially as described.

2. A machine of the class described comprising a frame or support having a stationary saw-setting jaw, a swinging arm having a movable saw-setting jaw, means for intermittently feeding the saw, a shaft, a wheel upon said shaft having a cam-groove provided with a lateral offset, a tooth or projection upon said swinging arm adapted to coact with said camgroove to close said jaw, and a spring for opening said jaw, when the offset portion of said cam-groove passes said tooth or projection, a shaft and a cam upon said shaft for engaging and disengaging said saw-feeder with and from the saw, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN C. REGKWEG.

Witnesses:

ARNOLD ARMSTRONG, FRETH A. LOUIS Bnreos. 

